This is only two data points, but you guys can do the remaining math yourself.  +/- 50% is not unusual when using smaller pools.  If things are orders of magnitude off (like the missing divs), that is when we have a problem.

Using my previously invented "instantaneous annualized return", at a share price of 0.04 we are currently making 4.745%.  Obviously, this will jump massively when the cointerra hardware arrives.

EDIT:  also, we see a "low week" followed by a "high week" followed by a "low week" - the obvious explanation is payouts happen every few days, and the high week had more paid out, possibly including some divs from the prior week, and the low week had btc still in the pool waiting to be paid out.  this is why more data is needed and there is insufficient evidence for lower-than-expected results at this time.  Also, I am assuming 2% pool fee above, it could also be 3 or 5%.